Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 140, Issue 2, Pages 439-444Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.04.043
Keywords
Chemical sensor; Fe(III)phthalocyanine tetrasulfonate; Polypyrrole; Nitrogen dioxide
Funding
- Council of Scientific and Industrial Research (CSIR), India
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The nitrogen dioxide (NO2) sensing capability of polypyrrole (PPy) was enhanced dramatically after functionalized with iron(III)phthalocyanine-4,4',4 '',4'''-tetrasulfonic acid monosodium salt (FePcTSA). The incorporated phthalocyanine was confirmed by different characterization techniques such as UV-vis spectroscopy, FTIR, GFAAS, EDAX, etc. The resistance of the functionalized PPy decreased spontaneously during exposure to NO2 gas at room temperature. This material exhibited excellent stability, reversibility, and reproducibility. The lowest response time (t(50)) thus obtained is 47 s with a highest response factor (Delta R/R-0 x 100) of 50.25. (C) 2009 Elsevier B.V. All rights reserved.
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